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ADS7142

ACTIVE

12-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package

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Data sheet

ADS7142

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 12 Sample rate (max) (ksps) 140, 950 Number of input channels 2 Interface type I2C Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode Supply Input voltage range (max) (V) 3.6 Input voltage range (min) (V) 0 Features Comparator, Oscillator, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.0009 Analog supply voltage (min) (V) 1.65 Analog supply voltage (max) (V) 3.6 SNR (dB) 71.5 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 12 Sample rate (max) (ksps) 140, 950 Number of input channels 2 Interface type I2C Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode Supply Input voltage range (max) (V) 3.6 Input voltage range (min) (V) 0 Features Comparator, Oscillator, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.0009 Analog supply voltage (min) (V) 1.65 Analog supply voltage (max) (V) 3.6 SNR (dB) 71.5 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
X2QFN (RUG) 10 3 mm² (1.5 mm × 2 mm)
  • Standalone, Nanopower Sensor Monitor for
    Cost-sensitive Designs
  • Small Package Size: 1.5 mm x 2 mm
  • Efficient Host Sleep and Wake-up
    • Autonomous Monitoring at 900 nW
    • Windowed Comparator for Event-triggered Host Wake-up
    • Data Buffering during Host Sleep
  • Independent Sensor Configuration and Calibration
    • Dual-Channel, Pseudo-Differential, or Ground-Sense Input Configuration
    • Programmable Thresholds for Calibration
    • Internal Calibration improves Offset and Drift
  • False Trigger Prevention
    • Programmable Thresholds per Channel
    • Programmable Hysteresis for Noise Immunity
    • Event Counter for Transient Rejection
  • Deep Data Analysis
    • Data Buffer for Fault Diagnostics
    • High Precision Mode for 16-bit Accuracy
    • One-Shot Mode for Fast Data Capture
  • I2C™ Interface
    • Compatible from 1.65 V to 3.6 V
    • 8 Configurable Addresses
    • Up to 3.4 MHz (High Speed)
  • Wide Operating Range
    • Analog Supply: 1.65 V to 3.6 V
    • Temperature Range: –40°C to 125°C
  • Standalone, Nanopower Sensor Monitor for
    Cost-sensitive Designs
  • Small Package Size: 1.5 mm x 2 mm
  • Efficient Host Sleep and Wake-up
    • Autonomous Monitoring at 900 nW
    • Windowed Comparator for Event-triggered Host Wake-up
    • Data Buffering during Host Sleep
  • Independent Sensor Configuration and Calibration
    • Dual-Channel, Pseudo-Differential, or Ground-Sense Input Configuration
    • Programmable Thresholds for Calibration
    • Internal Calibration improves Offset and Drift
  • False Trigger Prevention
    • Programmable Thresholds per Channel
    • Programmable Hysteresis for Noise Immunity
    • Event Counter for Transient Rejection
  • Deep Data Analysis
    • Data Buffer for Fault Diagnostics
    • High Precision Mode for 16-bit Accuracy
    • One-Shot Mode for Fast Data Capture
  • I2C™ Interface
    • Compatible from 1.65 V to 3.6 V
    • 8 Configurable Addresses
    • Up to 3.4 MHz (High Speed)
  • Wide Operating Range
    • Analog Supply: 1.65 V to 3.6 V
    • Temperature Range: –40°C to 125°C

The ADS7142 autonomously monitors signals while optimizing system power, reliability, and performance. It implements event-triggered interrupts per channel using a digital windowed comparator with programmable high and low thresholds, hysteresis, and event counter. The device includes a dual-channel analog multiplexer in front of a successive approximation register analog-to-digital converter (SAR ADC) followed by an internal data buffer for converting and capturing data from sensors.

The ADS7142 is available in 10-pin QFN package and consumes only 900 nW of power. The small form-factor and low power consumption make this device suitable for space-constrained and/or battery-powered applications.

The ADS7142 autonomously monitors signals while optimizing system power, reliability, and performance. It implements event-triggered interrupts per channel using a digital windowed comparator with programmable high and low thresholds, hysteresis, and event counter. The device includes a dual-channel analog multiplexer in front of a successive approximation register analog-to-digital converter (SAR ADC) followed by an internal data buffer for converting and capturing data from sensors.

The ADS7142 is available in 10-pin QFN package and consumes only 900 nW of power. The small form-factor and low power consumption make this device suitable for space-constrained and/or battery-powered applications.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet ADS7142 Nanopower, Dual-Channel, Programmable Sensor Monitor datasheet (Rev. A) PDF | HTML Dec 13, 2017
Circuit design ±12-V Voltage Sensing Circuit With an Isolated Amplifier and Pseudo-Differential (Rev. A) Jun 12, 2024
User guide BOOSTXL-ADS7142-Q1 BoosterPack™ Plug-In Module (Rev. B) PDF | HTML Jun 9, 2021
Circuit design Monitoring NTC Thermistor Circuit With Single-Ended ADC (Rev. A) PDF | HTML Jun 27, 2019
Application note TM4C1294 interface to ADS7142 software library (Rev. A) PDF | HTML Jan 11, 2019
Technical article Facing smart meter design challenges, part 1: maximizing battery life PDF | HTML Aug 16, 2018
Application brief Predictive Maintenance in Smart Meters Using Real-Time Monitoring Jul 13, 2018
Application brief Reduce False Triggers and Extend Battery Life in PIR Sensing Applications Mar 27, 2018
User guide BOOSTXL-ADS7142 BoosterPack™ Plug-In Module User's Guide (Rev. B) Mar 6, 2018
Application brief Extend Battery Life and Simplify Calibration in Gas Sensing Applications (Rev. A) Feb 6, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BOOSTXL-ADS7142-Q1 — ADS7142-Q1 2-channel 12-bit 140-kSPS I2C-compatible ADC BoosterPack™ plug-in module

BOOSTXL-ADS7142-Q1 is a platform for evaluating the performance of the ADS7142-Q1 successive approximation register (SAR) analog-to-digital converter (ADC), which is a nanopower, dual-channel, sensor monitor device. The evaluation kit includes the ADS7142-Q1 BoosterPack™ plug-in module, (...)

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Firmware

SBAC201 — ADS7142 Device Functional Modes Firmware

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GUI for evaluation module (EVM)

SBAC172 — ADS7142 EVM GUI

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Plug-in

SIMPLELINK-SDK-SENSOR-ACTUATOR-PLUGIN — Sensor and Actuator Plug-in for SimpleLink™ MCU SDKs

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Support software

SBAC245 — Source Files for SBAA353

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Simulation model

ADS7142 IBIS Model

SBAM333.ZIP (45 KB) - IBIS model
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Simulation model

ADS7142 TINA-TI Input Model (Rev. B)

SBAM349B.TSC (3089 KB) - TINA-TI reference design
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Simulation model

ADS7142 TINA-TI Transient Spice Model

SBAM380.ZIP (12 KB) - TINA-TI Spice model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

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Design tool

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The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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Design tool

SBAC226 — Source files for SBAA317

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Reference design

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TIDA-01546 — Battery and System Health Monitoring of Battery Powered Smart Flow Meters Reference Design

This reference design showcases innovative solutions for battery and system health monitoring of battery-powered Smart Flow Meters.  The battery monitoring subsystem provides highly accurate energy measurement and State of Health(SOH) projections which forecast battery lifetime. The system (...)
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Package Pins CAD symbols, footprints & 3D models
X2QFN (RUG) 10 Ultra Librarian
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